#include<bits/stdc++.h>
using namespace std;
int a[200005]
int T,n,m,L,V,ans;
int main(){
freopen("detect.in","r",stdin);
freopen("detect.out","w",stdout);
cin>>n>>m>>L>>V;
for(int i=1;i<=n;i++){
cin>>a[i]
}
cout<<ans;


return 0;
}
